Answer:
here look for it there is a sol
Step-by-step explanation:
https://www.careerlauncher.com/cbse-ncert/class-9/Math/CBSE-SurfaceAreasandVolumes-NCERTSolutions.html
2[4 − 7(3x + 4y)] + 2[3x(−2y)]
2[4 - 21x -28y] + 2[-6xy]
8 - 42x - 56y -12xy
the perimeter of given rectangular garden is (8 - 42x - 56y -12xy).
Answer:
To determine to measure of the unknown angle, be sure to use the total sum of 180°. If two angles are given, add them together and then subtract from 180°. If two angles are the same and unknown, subtract the known angle from 180° and then divide by 2.
Answer:
11.)4.79mi
12.)8cm
13.)10.6km
14.)5.93
15.)2yd
16.)5.41in
17)2y
18)2m
19)11.8yd
20)4.51km
Step-by-step explanation:
11.)15.8x2=31.6 31.6/6.6=4.79
12.)64/8=8
13.)26x2=54 54/4.9=10.6
14.)8.6x2=17.2 17.2/5.93
15.)2/1=2
16.)29.2/5.4=5.41
17)4/2=2
18)10/5=2
19)139.2/11.8=11.8
20)20.3/4.5=4.51
Answer:
6. r = 21 cm
7. A = 155.5 m²
Step-by-step explanation:
7: Formula for arc length is;
S = (θ/360) × 2πr
We are given;
S = 51 cm
θ = 139°
Thus;
51 = (139/360) × 2π × r
Making r the subject;
r = (51 × 360)/(2π × 139)
r ≈ 21 cm
8) Area of sector is gotten from the formula;
A = (θ/360) × πr²
A = (220/360) × (π × 9²)
A = 155.5 m²
